# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1443979549 -7200
# Node ID 904ff97afe315a9569480b0646f0095c4261b24f
# Parent  0634014ddde59f6867527f85e68c1d37624277e6
Limit colour exchange to those below a certain frequency threshold.

diff -r 0634014ddde5 -r 904ff97afe31 optimiser.py
--- a/optimiser.py	Sun Oct 04 18:07:00 2015 +0200
+++ b/optimiser.py	Sun Oct 04 19:25:49 2015 +0200
@@ -171,7 +171,7 @@
                 else:
                     c[value] += f
 
-        c = [(n, value) for value, n in c.items()]
+        c = [(n/width, value) for value, n in c.items()]
         c.sort(reverse=True)
         colours.append(c)
 
@@ -191,9 +191,11 @@
         if least:
             switched = []
             for j in 1, 2:
-                i = randrange(2, len(c))
-                switched.append(c[i])
-                del c[i]
+                i = randrange(0, 4)
+                n, value = c[i]
+                if n < 0.1:
+                    switched.append(c[i])
+                    del c[i]
             c += switched
             most = [value for n, value in c[:4]]
             least = [value for n, value in c[4:]]